I have other VPX tools and love the battery life, the charger system and the fact that you can daisy chain them togather and only use 1 electrical outlet for 3 chargers. It states that the battery does not come with this item, so you will need to buy the lithium Ion battery and battery charger if you don't already have a VPX system. I do and I keep this in my tool bag for those times when I need to recharge my cell phone and I can't find an unused electrical outlet or on construction sites that do not have power yet, or camping, boating or maybe you just don't want to buy that $40 car charger for you cell phone, last couple of phones I got only came with the AC charger. This is light weight and slips into my purse, tool pouch, backpack or jacket pocket with ease. Battery will hold its charge even when left unused for a couple of months.